5. Most databases now use an implied boolean logic search scheme so a keyword search will get you started.

6. Boolean logic is the use of AND, NOT, OR to narrow or expand your search

10. Look for patterns

11. Look at reference sources, LC subject heading list, subject headings in research tools

12. Ask a librarian 

13. Look at thesaurus in the research tools

22. Does not require an exact match

23. Generates comparatively large number of hits (not precise)

24. Good if you are not familiar with terminology

27. Usually requires an exact match between your term and a pre-set list of terms

28. Precise

29. Can be used after keyword search has identified specific subjects